Remove KRB5_TRACE to avoid trace logging output

We can remove the trace since OSPCIX-936 has been resolved

Author: adrianfusco

roles/dlrn_report/tasks/dlrn_report_results.yml

@@ -20,8 +20,6 @@
       kinit
       {{ cifmw_dlrn_report_krb_user_realm }}
       -k -t {{ cifmw_dlrn_report_keytab }}
-  environment:
-    KRB5_TRACE: /dev/stdout
   retries: 5
   delay: 60
   register: _kinit_status